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riscv-openocd/src/flash/nor/dsp5680xx_flash.c

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/***************************************************************************
* Copyright (C) 2011 by Rodrigo L. Rosa *
* rodrigorosa.LG@gmail.com *
* *
* Based on a file written by: *
* Kevin McGuire *
* Marcel Wijlaars *
* Michael Ashton *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
/**
* @file dsp5680xx_flash.c
* @author Rodrigo L. Rosa <rodrigorosa.LG@gmail.com>
* @date Thu Jun 9 18:21:58 2011
*
* @brief This file implements the basic functions to run flashing commands
* from the TCL interface.
* It allows the user to flash the Freescale 5680xx DSP.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "imp.h"
#include <helper/binarybuffer.h>
#include <helper/time_support.h>
#include <target/algorithm.h>
#include <target/dsp5680xx.h>
struct dsp5680xx_flash_bank {
struct working_area *write_algorithm;
};
static int dsp5680xx_build_sector_list(struct flash_bank *bank)
{
uint32_t offset = HFM_FLASH_BASE_ADDR;
bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
int i;
for (i = 0; i < bank->num_sectors; ++i) {
bank->sectors[i].offset = i * HFM_SECTOR_SIZE;
bank->sectors[i].size = HFM_SECTOR_SIZE;
offset += bank->sectors[i].size;
bank->sectors[i].is_erased = -1;
bank->sectors[i].is_protected = -1;
}
LOG_USER("%s not tested yet.", __func__);
return ERROR_OK;
}
/* flash bank dsp5680xx 0 0 0 0 <target#> */
FLASH_BANK_COMMAND_HANDLER(dsp5680xx_flash_bank_command)
{
struct dsp5680xx_flash_bank *nbank;
nbank = malloc(sizeof(struct dsp5680xx_flash_bank));
bank->base = HFM_FLASH_BASE_ADDR;
bank->size = HFM_SIZE_BYTES; /* top 4k not accessible */
bank->driver_priv = nbank;
bank->num_sectors = HFM_SECTOR_COUNT;
dsp5680xx_build_sector_list(bank);
return ERROR_OK;
}
/**
* A memory mapped register (PROT) holds information regarding sector protection.
* Protection refers to undesired core access.
* The value in this register is loaded from flash upon reset.
*
* @param bank
*
* @return
*/
static int dsp5680xx_flash_protect_check(struct flash_bank *bank)
{
int retval = ERROR_OK;
uint16_t protected = 0;
retval = dsp5680xx_f_protect_check(bank->target, &protected);
if (retval != ERROR_OK) {
for (int i = 0; i < HFM_SECTOR_COUNT; i++)
bank->sectors[i].is_protected = -1;
return ERROR_OK;
}
for (int i = 0; i < HFM_SECTOR_COUNT / 2; i++) {
if (protected & 1) {
bank->sectors[2 * i].is_protected = 1;
bank->sectors[2 * i + 1].is_protected = 1;
} else {
bank->sectors[2 * i].is_protected = 0;
bank->sectors[2 * i + 1].is_protected = 0;
}
protected = (protected >> 1);
}
return retval;
}
/**
* Protection funcionality is not implemented.
* The current implementation applies/removes security on the chip.
* The chip is effectively secured/unsecured after the first reset
* following the execution of this function.
*
* @param bank
* @param set Apply or remove security on the chip.
* @param first This parameter is ignored.
* @param last This parameter is ignored.
*
* @return
*/
static int dsp5680xx_flash_protect(struct flash_bank *bank, int set, int first,
int last)
{
/**
* This applies security to flash module after next reset, it does
* not actually apply protection (protection refers to undesired access from the core)
*/
int retval;
if (set)
retval = dsp5680xx_f_lock(bank->target);
else {
retval = dsp5680xx_f_unlock(bank->target);
if (retval == ERROR_OK) {
/* mark all as erased */
for (int i = 0; i <= (HFM_SECTOR_COUNT - 1); i++)
/* FM does not recognize it as erased if erased via JTAG. */
bank->sectors[i].is_erased = 1;
}
}
return retval;
}
/**
* The dsp5680xx use word addressing. The "/2" that appear in the following code
* are a workaround for the fact that OpenOCD uses byte addressing.
*
* @param bank
* @param buffer Data to write to flash.
* @param offset
* @param count In bytes (2 bytes per address).
*
* @return
*/
static int dsp5680xx_flash_write(struct flash_bank *bank, uint8_t * buffer,
uint32_t offset, uint32_t count)
{
int retval;
if ((offset + count / 2) > bank->size) {
LOG_ERROR("%s: Flash bank cannot fit data.", __func__);
return ERROR_FAIL;
}
if (offset % 2) {
/**
* Writing to odd addresses not supported.
* This chip uses word addressing, Openocd only supports byte addressing.
* The workaround results in disabling writing to odd byte addresses
*/
LOG_ERROR("%s: Writing to odd addresses not supported for this target", __func__);
return ERROR_FAIL;
}
retval = dsp5680xx_f_wr(bank->target, buffer, bank->base + offset / 2, count, 0);
uint32_t addr_word;
for (addr_word = bank->base + offset / 2; addr_word < count / 2;
addr_word += (HFM_SECTOR_SIZE / 2)) {
if (retval == ERROR_OK)
bank->sectors[addr_word / (HFM_SECTOR_SIZE / 2)].is_erased = 0;
else
bank->sectors[addr_word / (HFM_SECTOR_SIZE / 2)].is_erased = -1;
}
return retval;
}
static int dsp5680xx_probe(struct flash_bank *bank)
{
LOG_DEBUG("%s not implemented", __func__);
return ERROR_OK;
}
static int dsp5680xx_flash_info(struct flash_bank *bank, char *buf,
int buf_size)
{
snprintf(buf, buf_size,
"\ndsp5680xx flash driver info:\n - See comments in code.");
return ERROR_OK;
}
/**
* The flash module (FM) on the dsp5680xx supports both individual sector
* and mass erase of the flash memory.
* If this function is called with @first == @last == 0 or if @first is the
* first sector (#0) and @last is the last sector then the mass erase command
* is executed (much faster than erasing each sector individually).
*
* @param bank
* @param first
* @param last
*
* @return
*/
static int dsp5680xx_flash_erase(struct flash_bank *bank, int first, int last)
{
int retval;
retval = dsp5680xx_f_erase(bank->target, (uint32_t) first, (uint32_t) last);
if ((!(first | last)) || ((first == 0) && (last == (HFM_SECTOR_COUNT - 1))))
last = HFM_SECTOR_COUNT - 1;
if (retval == ERROR_OK)
for (int i = first; i <= last; i++)
bank->sectors[i].is_erased = 1;
else
/**
* If an error occurred unknown status
*is set even though some sector could have been correctly erased.
*/
for (int i = first; i <= last; i++)
bank->sectors[i].is_erased = -1;
return retval;
}
/**
* The flash module (FM) on the dsp5680xx support a blank check function.
* This function executes the FM's blank check functionality on each and every sector.
*
* @param bank
*
* @return
*/
static int dsp5680xx_flash_erase_check(struct flash_bank *bank)
{
int retval = ERROR_OK;
uint8_t erased = 0;
uint32_t i;
for (i = 0; i < HFM_SECTOR_COUNT; i++) {
if (bank->sectors[i].is_erased == -1) {
retval = dsp5680xx_f_erase_check(bank->target, &erased, i);
if (retval != ERROR_OK) {
bank->sectors[i].is_erased = -1;
} else {
if (erased)
bank->sectors[i].is_erased = 1;
else
bank->sectors[i].is_erased = 0;
}
}
}
return retval;
}
struct flash_driver dsp5680xx_flash = {
.name = "dsp5680xx_flash",
.flash_bank_command = dsp5680xx_flash_bank_command,
.erase = dsp5680xx_flash_erase,
.protect = dsp5680xx_flash_protect,
.write = dsp5680xx_flash_write,
/* .read = default_flash_read, */
.probe = dsp5680xx_probe,
.auto_probe = dsp5680xx_probe,
.erase_check = dsp5680xx_flash_erase_check,
.protect_check = dsp5680xx_flash_protect_check,
.info = dsp5680xx_flash_info
};
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